Method for forming conductor pattern of circuit board

Abstract

Abstract PURPOSE:To compose the circuit pattern of high accuracy and high density by trimming a conductor layer by projecting a laser light on the conductor layer on an insulating board and forming the conductor pattern by the remained conductor layer. CONSTITUTION:The laser beam 3 emitted from a laser light oscillator is focused in the spot of which diameter is <= the specified value on the thin conductor layer 2 formed on the whole face of the above of an insulating board 1. The conductor layer 2 is cut by the laser beam 3 according to the preset pattern, trimming grooves 4A, 4B, 4C, 4D, 4F are formed and the conductor pattern of the conductor gap and conductor width of <= the specified value is obtd. Since the dimension of the conductor pattern can be made less than the specified value by trimming the conductor layer by a laser light and reducing the diameter of the spot of a laser beam the circuit pattern of high accuracy and high density can be constituted.

Inventors

• 👤 Takao Matsubara

Bibliographic Details